Z = (2-I) ^ 2, find the modulus of complex Z What is the mathematical meaning of "module" here Sorry, I hope you understand

"Module" means length
z=（2-i）^2=4-4i-1=3-4i
3 ^ 2 + 4 ^ 2 = 5 under the module = root of Z
Complex modulus is usually square before root

RELATED INFORMATIONS

1. What is the square of the complex number (5I + 2),
2. Let z = a + bi, and a, B satisfy a (1 + I) &# 179; + (2-5i) = bi-4, then the conjugate complex number of Z is=
3. In the complex plane, if the complex number corresponding to vector AB is 2 + I and the complex number corresponding to vector CB is - 1-3i, then the complex number corresponding to vector CA is () A. 1-2iB. -1+2iC. 3+4iD. -3-4i
4. How many festivals are there in a year
5. How was your holiday?
6. Where else did you go last holiday
7. English translation Finally,the vacation comes
8. Translate each festival into English Children's Day May Day New Year's Day Teacher's Day Chrestmas Day Women's Day National Day April Food's Day Tree Planting Day the Army Day
9. English translation Such as the title
10. There are different English translations of festivals all over the world There are different English translations of festivals all over the world there are different Don't translate with computer tools
11. The module of complex number Z = [(1 + I) ^ 200 * (6 + 2I) - (1-I) ^ 198 * (3-I)] / [(1 + I) ^ 198 * (23-7i) + (1-I) ^ 194 * (10 + 2I), find | Z| Don't use triangles. I haven't taught you
12. Modules of complex numbers What is the module of 1 + radical 3I What is the main value of the radiation angle
13. Complex modulus```````` If the module of complex number (radical 2 - 2ai) / (a + 2I) is radical 2, then the value of real number a is_____
14. Given the complex number Z = (m-3m-4) + (M-4) I, find the value range of real number M
15. Given the complex z = 2m-1 + (M + 1) I (1) if the point corresponding to the complex Z is in the first quadrant, find the value range of the real number m; (2) if the complex | Z | ≤ 3, find the value range of the real number M
16. The complex z = 3 + AI and | Z-2 are known|
17. May I ask the general expression and number of terms of bivariate polynomials of higher degree The bivariate polynomial is Z = A0 + A1 * x + A2 * y, and there are three terms; The bivariate quadratic polynomial is Z = A0 + A1 * x + A2 * y + a3 * x * x + A4 * x * y + A5 * y * y, with 6 terms; So if it is a binary m-degree polynomial, how to express it? What is the total number of terms?
18. Several formulas for multiplication of polynomials by polynomials (a+b)(c+d)= (a+b)(c-d)= (a-b)(c+d)= (a-b)(c-d)= How to write these formulas?
19. Can 1.8A and 1.2A be multiplied? Or, can similar terms be multiplied
20. What is an item? What is the number of items? What is a similar item?